Lifting-jack



S N A V E J., E. .um d 0. M. 0 N

LIFTING JACK.

Patented Jal-n. 16, 1883.

UNITED STATES Aram FFICE.

EDWIN J. EVANS, OE LEAVENWORTH, KANSAS.

LI FTING-JACK.

SPECIFICATION forming part of Letters Patent No. 270,649, dated January16, 1883.

Application tiled J une Q6, 1882. (No model.)

To all whom it may concern:

Beit known that I, EDWIN J. EVANS, aciti zen of the United States,residing at Leavenworth city, in the county ot' Leavenworth and State ofKansas, have invented certain new and useful Improvements inWagon-Jacks; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being had to theannexed drawing, making a part of this specification, and to the lettersand tigures of reference marked thereon.

The present invention has relation to certain new and usefulimprovements in wagon-jacks;

and the object thereof is to provide such a devicev that will possessgreat leverage-power, readily and easily operated, as well as simple inits construction, and having the required strength. These severalobjects I attaiuby the construction substantially as shown inthedrawing, hereinafter described, and claimed.

In the accompanying drawing, which represents a perspective view of myinvention, A designates a. suitable standard, connected to a support orbase, a.. hy mortising or otherwise, as found most desirable.

To each side ofthe standard A, nearits lower end, are pivoted arms B,the upper ends ot' said arms being pivoted in turn to the lower endofthe lit'ting-harC, having the usual steps, b. Thelit'tingbar C hasconnected to it by screws, bolts, or other suitable means, a metalyoke,c,'which passes over the end of the standard A, to guide and steadythe lifting-bar when being elevated or lowered.

Upon each side ofthe standard A isa metal strap, (I, the forward endsthereof having a series of notches, c, adapted to tit over the bolt f,between the armsB and lifting-bar C. This construction enables theheight ot' the liftingbar C to he regulated by raising the notched endsofthe stra-ps and bringing any one of the series of notches to engagewiththe bolt, thus adapting the lifting-jack to a variety of workwithout requiring so great 'a leverage-power upon the cam-lever I), towhich the straps d are pivoted. I do not, however, desire to beunderstood as confining myself to such construction, as in place of thenotched ends of the straps the bolt may pass directly through the metalstraps.

The cant-face of the lever D bears against the standard A, and bypressing down upon it the lever will draw the metal straps toward it,and also the arms and lifting-bar, raising the latter and the objectupon itto the required height.

In addition to one or more steps b upon the lifting-bar C, it may beprovided with an adjustable step, E, secured to the har by a bolt, g,passing through the step and through one of a series of holes, h, in thelifting-bar.

.By removing the holt g and replacing it in another one ot' the holes hthe height of the step E is changed, thus adapting it to t any unusualheight of axle, or for other lifting purposes where the steps b couldnot be used.

It will be seen that a jack is provided that can be readily used for alllifting purposes, and possesses great power, strength, and durability,and is not likely to become broken or get out of order by any unduestrain or weight.

Having nowfnlly described my invention, what I claim as new, and desireto secure by Letters Patent, is-

1. In a lifting-jack, the combination, with the standard A, pivoted armsB, and lifting bar C, having-yoke c, ofthe straps dand calnoperatinglever D, pivoted together and constructed to operate substantially asand for the purpose set forth.

Z. In a lifting-jack, the standard A, pivoted arms B, and lifting-bar(J, in combination with the cam-lever D and plates or straps d, pivotedto said lever, and at their oppositeend having notches e, adapted toengage with the boltf, as set forth.

3. In a liftingjaclt, the lifting-bar C, having stationary step b, incombination with the adjustable step E, as and for the purposespecilied.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

EDWIN J. EVANS.

I/Vitnesses:

J. H. NOBLE, L. HAWN.

